Coffee maker



FIG. 1 is a front perspective view of the coffee maker,

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side view, the left side view being a mirror image thereof; and,

FIG. 5 is top plan view thereof.

The broken lines are for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a coffee maker, as shown and described. 